(adsbygoogle = window.adsbygoogle || []).push({}); what will happen because of my custom frimware should i change it back ?

how do you go back to OFW on geohots CFW?

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You just download the 3.55 Sony firmware and make a folder on a USB called PS3 > UPDATE and plug it in the PS3 goto system update > USB Storage
And that's it pretty much

not unless u run backups